Ultrafast demagnetization at high temperatures. (17th April 2018)

• Record Type: Journal Article
• Authors: Hoveyda, F; Hohenstein, E; Judge, R; Smadici, S
• Is Part Of: Journal of physics. Volume 30:Number 19(2018)
• Publication Date: 2018-04-17
• Subjects: ultrafast -- magnetism -- heat; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aab9f1
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Time-resolved pump-probe measurements were made at variable heat accumulation in Co/Pd superlattices. Heat accumulation increases the baseline temperature and decreases the equilibrium magnetization. Transient ultrafast demagnetization first develops with higher fluence in parallel with strong equilibrium thermal spin fluctuations. The ultrafast demagnetization is then gradually removed as the equilibrium temperature approaches the Curie temperature. The transient magnetization time-dependence is well fit with the spin-flip scattering model.